Cutting machine



Dec. 6, 1938. F. E. BERTRAND CUTTING MACHINE Filed Nov. 5, 1937' 3Sheets-Sheet 1 F. E. BERTRAND CUTTING MACHINE Dec. 6, 1938..

Filed Nov. 5, 1937 3 Sheets-Sheet 2 u u u Dec. 6, 1938.

F. E. BERTRAND CUTTING MACHINE Fil ed Nov. 5, 1957 3 Sheets-SheetPatented Dec. 6, 1938 PATENT OFFICE CUTTING MACHINE Frederic E.Bertrand, Lynn, Mass.,

United Shoe Machinery Corporation,

assignor to Paterson,

N. J., a corporation of New Jersey Application November 5, 1937, SerialNo. 172,997

31 Claims.

My invention relates to machines by which such objects as soles are cutfrom pieces of stock to correspond to patterns, it being of especialutility in connection with the production of insoles.

In forming insoles, as those of the skeletontype, which have been firstrounded from a blank with an outsole to the contour of the latter andthen split therefrom, the narrow margin which is left to be removed andthe necessity for establishing the correct relation to the outsole inmaking a shoe requires accuracy in locating the work-pieces upon thepatterns. An object of this invention is to properly gage the positionof work-pieces of different sizes with respect to their patterns; toconveniently remove the gaging means from its active relation to thepattern to avoid interference with the movable cutting mechanism orknife; and to render it impossible to start the cutting movement unlesssuch interference has been guarded against.

In the achievement of this object, I combine with a pattern, as one of aset of interchangeable patterns of different sizes, a movable carrier,which is oscillatory in the illustrated form of the invention, and awork-gage movable upon and positioned in the direction of movement ofsaid carrier upon contact with the pattern. By this arrangement,movement of the carrier into active position may always be to the samepoint, so the gage will be presented to the pattern for movement in thesame direction, whatever may be the pattern-size. Were, instead, thegaging means caused to move through different angles into contact withdifferent sizes of patterns, the relation between the gaging surfaces,as that engaging the pattern and that engaged by the work, would bedisturbed, the error increasing with the increase in size andnecessitating manual adjustment. In the disclosed embodiment of theinvention, the gage is yieldable upon its carrier, so upon attainment bythe carrier of its unvarying active position, the gage may beautomatically adjusted thereon by contact of a surface upon it With thepattern. Under these conditions, the second gage-surface will always beso located as to give the same width of margin to be removed from thework-piece. Means is, however, preferably provided for altering therelation between the two gaging surfaces, so the width of the cut-offmargin may be varied. The gage may be in the form of a slide urgedyieldably forward, as by a spring, upon a pivoted carrier-armfor itsself-adjusting contact with the pattern. As the normal projection of thegage upon its carrier to its full extent might locate it at a pointwhere interference with the cutting mechanism would occur, or engagementwith the pattern at an angle to the plane of said pattern prevent theproper yield of the gage, I provide means for temporarily retaining saidgage against forward movement upon its carrier. This retaining means maycomprise a clutch member in-. terposed between the gage-slide and thecarrier, it being released for a succeeding gaging operation by a memberadjustably fixed relatively to the carrier. By this arrangement, thegage-slide may be retained upon the carrier after each operation at sucha point that it is out of the path of the cutting mechanism and locatedfor correct presentation to the periphery of the pattern and is thenfreed to be set by its engagement with said pattern. To shift the gagemechanism from active relation to the pattern, I prefer to connect it totreadle mechanism by which is produced relative movement between thepattern and an abutment which co-operates therewith to clamp the work.This connection may be through a cable joining the treadle mechanism tothe gage mechanism. To permit the performance of such operations aschanging patterns without interference by the gage mechanism, means ispreferably provided for moving the gage from the pattern and for lockingsaid gage in its inactive position out of co-operation with the pattern.With the gage mounted upon a shaft, as in the form of the inventiondisclosed herein, the securing of the gage mechanism in its positionremoved from the pattern may be effected by locking the shaft to theframe of the machine, as by an arm through which the shaft is joined tothe machinetreadle. To insure the separation of the gage mechanism fromthe path through which the cutting mechanism travels, so damage to theparts shall not occur, there is combined with the lever or other memberby which the cutting mechanism is started in operation, means forpreventing the action of the starting member until after movement of themember by which is controlled the relative work-clamping movement of thepattern and co-operating abutment. Since this relative movement iscommunicated to the gage mechanism to determine its active or inactiveposition, the ability of the operator to start the knife-travel may bemade dependent upon the relation of the gage mechanism to the pattern.Herein, I have shown a member connected to the starting lever for theknife mechanism and movab e nto and out of locking position for thelever by the treadle controlling the work-clamping member.

In the accompanying drawings, illustrating a particular embodiment of myimproved machine,

Fig. 1 shows in perspective a sole-rounding machine to which myinvention is applied;

Fig. 2, a side elevation of the elements more closely associated withthe work;

Fig. 3, a horizontal section on the line IIIIII of Fig. 2, and

Fig. 4, a detail in side elevation of the controlling mechanism.

Generally, the apparatus may be as disclosed in Letters Patent of theUnited States No. 1,048,511, Eaton, December 31, 1912. Here, a standardID has an arm [2 overhanging a horizontal pattern l4 mounted uponstationary posts i6, I6 for interchange with other patternscorresponding to soles of different sizes. Movable vertically throughthe arm is a plunger I 8 carrying at its lower extremity a horizontalclamp or abutment 29 for co-operation with the pattern to grasp betweenthem a Work-piece W, from which such an object as an insole is to becut. The clamp is joined by connections 2| through the standard and itsarm to a treadle 22 fulcrumed at the base of the standard and is heldnormally separated from the pattern by a spring 24. The treadlemechanism is preferably as shown in Letters Patent of the United StatesNo.

1,853,495, Bertrand, April 12, 1932, in which a fulcrum member for thetreadle 22 is in the form of a lever 25, best shown in Fig. 4 of thepresent case. When the treadle is depressed to lower the clamp intoengagement with the work, this lever swings to the left through aconsiderable angle after such contact has been established. Rotatableupon the standard below the pattern is a support 26 driven from apower-shaft 28 through clutch mechanism 30. A starting lever 32fulcrumed upon the standard is held normally raised by a spring 34 andwhen depressed trips the clutch mechanism to turn the support 26.Mounted upon the support for movement thereby about the periphery of thepattern is a knife 36 fixed in a block 38 contacting with the pattern,the changing contour of which it may be caused to follow by the mountingof the block upon the rotary support.

As to the features peculiar to the present invention, the arm l2 has ahorizontal extension 40, from which project brackets 42. At one side ofthe extension, lying substantially parallel to the longitudinal axis ofthe pattern I 4, a shaft 44 is journaled in the brackets, this being connected by bevel-gearing 45 to a short shaft 48 rotatable in the bracketsat right-angles to such longitudinal axis and above the toe-portion ofthe pattern. Upon these shafts 44 and 48 oscillatory arms 50 aresecured, each carrying at its lower extremity gaging means, the gage atthe outer side of the forepart of the pattern being designated as G andthat at the end of the toe at G. Both the arms 50 are urged toward theperiphery of the pattern to bring them into active positions by anexpansion-spring 54 (Fig. 2) situated in a horizontal bore in theextension 40 and acting against an arm 56 projecting upwardly from theshaft 48. e To remove the gages from the pattern when the knife 36 isperforming the cutting operation, the supporting arms are swungoutwardly and upwardly by means to be described later. The two gagingmeans may be in all essential respects the same, so but one will bedescribed in detail. Arranged for adjustment longitudinally of the arm50 is a carrier member 58, which may be secured by a slot-andscrewconnection 60 in the desired position when the appartus is set up. Thecarrier has a portion 62, which, when the lower end of the arm is inproximity to the pattern, is substantially horizontal. In the portion 62of the carrier a gage-slide 64 is guided and. has, at its inner end, arounded surface 66 for contact with the pattern. Near this inner end,there is attached to the slide for longitudinal adjustment thereon by aslot-and-screw connection 68, a gage-portion l rising above the slide toreceive contact of a work-piece resting upon the pattern. Thecontact-end of the portion is preferably rounded at 12 similarly to theslide-end 66. The adjustment of the end 12 of the gage-portion upon itsslide with relation to that of the slide determines the extent to whicha work-piece W supported upon the pattern will overhang the periphery ofsaid pattern, and, consequently, the width which the knife 36 willremove.

The slide 64 is shown as urged forward in the carrier-portion 6| by atorsion-spring 14, which engages these two elements at their undersides, this movement of the slide being to the extent permitted by astop-pin l6 rising from its outer extremity and entering a slot 13 inthe carrier. In the lowered active position of either of the gages G, G,the supporting arm 50 of the gage is always substantially vertical, itbeing also separated from the periphery of the pattern, regardless ofthe size employed. The range of movement of the slide in its carrier issufiicient to cause said slide to advance under the influence of itsspring 14 until the end-surface 66 will engage the smallest pattern, andto yield outwardly from the largest pattern. The relation of thework-engaging end 12 to the pattern-engaging and 66 controls the widthof the scrap cut by the knife 36 in all positions of the slide. As thegaging surfaces 66 and 12 are varied in position upon the carrier by thecontact of the surface 66 with patterns of different sizes, theirmovement will be always substantially horizontal or in the direction ofextension of the pattern and work which they engage. Since there is acondition of parallelism between the work and pattern, the separation ofthe surface 12 from the edge of the pattern when the surface 66 contactstherewith remains constant for patterns of all sizes, and manualadjustment is unnecessary.

Were the forward projection of the slide 64 from the carrier-portion 62by the spring 14 to continue during the movement of the supporting arm56, difficulty might be caused. Upon lowering the arm, the slide mightpass under the larger patterns instead of establishing end-to-endengagement, or the angle at which contact was made might cause the slideto bind in its carrier. Further, in the use of large patterns, theslide, even with the arm raised, might lie in the path of travel of theknife and thus cause interference. To avoid such difiiculties, I providemeans for temporarily locking the slide in the position in which thepattern leaves it after each operation, releasing it to be forced fromthe carrier by the spring only when the gage has been lowered intoco-operation with the pattern. At one side of the slide is a chamber 80,formed at the top and bottom and at the ends by the walls of thecarrier, and at the sides between the edge of the slide and a wall 82,which is inclined inwardly toward the slide and arranged for adjustmenttoward and from said slide by a slot-and-screw connection 84,,

to permit the width of the chamber to be varied. Within this chamber,for engagement with the slide and with the wall 82, is a clutch-disk 86,or like member having a curved periphery. An expansion-spring 88 isinterposed between a wall of the carrier and the periphery of the disk,forcing the latter between the inclined wall 82 and the slide to retainsaid slide against inward movement under the influence of the spring 14.When the supporting arms are swung down into gaging relation, the lockfor the slide is released. This may be effected by a tripping pin 90movable in a horizontal bore in the carrier and contacting at its innerend with the locking disk, while its outer extremity is engaged by avertical actuating lever 9| fulcrumed upon and extending above theportion'62 of the carrier. As a gage, in its descent, approaches apattern, the upper end of the lever 9I strikes the angular end 92 of areleasing rod 94 depending from the forward bracket 42. The rod passesthrough a substantially vertical opening in a sleeve or holder 95, inwhich it is secured by a set-screw 93. From one side of the holderprojects a shank Hit arranged to turn in the bracket but fixed thereinby a set-screw I02. The adjustment under the control of the screw 98provides for the proper location of the rodportion 92 longitudinally ofthe lever 9I, while the adjustment obtained by the screw I92 changes theangle of the rod. This determines the time in the descent of the arm atwhich the slide would be released from its lock to be carried forward bythe spring 14 into engagement with the pattern.

A work-piece having been positioned upon the pattern by the surfaces I2,I prefer to make the removal of the gages G, G from their activepositions, contacting with said pattern at 66, an incident to anothergoverning action performed by the operator. For this purpose, I rotatethe shafts 44 and 48 through a connection to the treadle mechanism, sowhen the treadle 22 is depressed to clamp the gaged work, thecarrier-arms, with the gages, will be swung outwardly. For this purpose,there is fast upon the shaft 44 an arm Hi4 extending upwardly. To thisarm is attached a cable or flexible member I06 guided by grooved rollsI98 and H rotatable upon a bracket II2 secured to the frame-arm I2. Theroll III] is shown as adjustable in position upon the bracket to take upslack in the cable. At the bottom of the standard it, the cable passesbeneath a guideroll I I4 and then forward to the lever 25, to which itmay be made fast at IIE. When the lever moves outwardly under theinfluence of the descending treadle, the force applied to the cableturns the shaft 44 and, through the gearing 46, the shaft 43, to raiseboth gages from the pattern. It may be desired to nullify the effect ofthe spring 54 upon the arms 59, so the gages may remain temporarilyelevated, regardless of the position of the treadle. Upon the arm I04 isshown a handle H8 by which the operator may rotate the shafts 44 and 48and raise the gages. They may be thus retained by a spring-actuated pinI2il, which may be turned and released to enter a bore I22 in theadjacent bracket 42.

Were the power-operation of the machine to be started by lowering thelever 32 with the gages in their active positions, the knife 36 and itsblock 33 would strike said gages, and the parts would be broken. Toinsure against this, there is pivotally joined to the starting lever arod I24 (Fig. 4) variable in length and having at its lower extremity anangular portion or enlargement I26. The rod passes through a guide I28swiveled upon the rearwardly extending arm of the fulcrumlever 25 of thetreadle mechanism. With the starting lever and the treadle in theirnormal elevated positions, the rod-portion I26 lies just above a nut I29carried by the end of a spindle I I3!) mounted in fixed bearings. When,however, and only when, the treadle has been depressed by the operatorto clamp the work, and the gages have consequently been removed from thepath of the knife mechanism, the entire horizontal extent of therod-portion I26 will have been shifted to the left of the nut I29. Thisis effected by the guide I28 upon oscillation of the lever 25 by thedescending treadle, this freeing the starting lever for actuation.

In the use of this machine, the operator places upon the posts I6 apattern I4 corresponding to the insole to be out. By adjustment of theworkengaging portions III of the gages G and G, if this be necessary,these will be arranged to correspond to the excess of dimensions of ablank W, which has been formed by splitting an outsole-insolecombination, over those of the desired insole. Normally, the ends 65 ofthe gages are in contact with the pattern and by placing the forwardextremity of the blank against the surface I2 of the gage G and the sideof the forepart against that of the gage G, with the heel-portion of theblank located upon the pat tern by its relation to the knife 36, thework will be symmetrically disposed for the removal of the marginalexcess of material. Then the treadle 22 is depressed to lower the clamp20 upon the work, holding this for the rounding operation. As the lever25 of the treadle mechanism shifts in the application of the pressure,it draws down the cable IBIS and rotates the shafts 44 and 48 to swingup the arms 50 and carry the gages away from the pattern. Theclutchcontrolling levers 9| of the gages have been resting against theportions 92 of the releasing rods 94, the pins 90 holding the disks 85out of clutching engagement for the positioning of the gageslides 64 bytheir contact with the pattern. As the gages leave the pattern, thedisks are relieved from the effect of the rods, the springs 88 beingfree to force said disks into their clutching relation. The gage-slidesare thus locked against inward movement upon their carriers and are soheld clear of the path of the knife mechanism, whatever may be the sizeof the pattern. The lowering of the treadle, so the clamp is upon thework and the gages are away from the pattern, has caused the lever 25 toshift the portion I26 of the rod I24, depending from the starting lever32, away from the stop-projection I3t. Thus freed, the previous lockedstarting lever may be depressed to trip the clutch 39 and transmit powerto the knife mechanism, which rounds the blank W, to the contour of thepattern. Upon release of the treadle by the operator the spring 54restores the gages to their active positions ready for cooperation withthe next work-piece. As these positions are approached, the rods 94 tripthe clutch-disks, so the gage-slides may adjust themselves by contactwith the particular pattern in use. Because these gage-slides are lookedback when raised, they will not be interfered with by the pattern whilelying at one acute angle thereto during the oscillation of theirsupporting arms but will strike its periphery'at right angles moving ina substantially horizontal direction. This permits the slides to yieldproperly against their springs '34. When the pattern is to be changed,the gages may be maintained in their raised or inactive positions byactuation of the hand-lever I04 and the securing of these to the frameby the pin I20.

Having thus described my invention, what I claim as new and desiretosecure by Letters Patent of the United States is:

In a cutting machine, a pattern, a movable carrier, and a work-gagemovable upon the carrier and positioned thereon in the direction ofmovement of said carrier upon contact with the pattern.

In a cutting machine, a pattern, an oscillatory carrier, and a work-gagemovable upon the carrier during the oscillation thereof and movable bysuch oscillation into and out of active relation to the pattern, saidgage being provided with a surface for contact with the pattern and asurface to receive contact of the work.

3. In a cutting machine, a pattern interchangeable with patterns ofother sizes, an oscillatory carrier, a work-gage movable upon thecarrier in the direction of movement thereof and movable by theoscillation of said carrier into and out of active relation to thepattern, and means for urging the gage upon the carrier yieldably towardthe pattern.

4. In a cutting machine, a pattern, a movable carrier, a spring urgingthe carrier toward the pattern, a work-gage movable upon the carrier forcontact with the pattern, and a spring urging the gage toward thepattern.

In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame, and a slide movable upon the arm under thecontrol of the pattern, said slide being provided with a gage-surfacefor contact with the pattern and a gage-surface for contact with workapplied to the pattern.

6. In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame, a slide movable upon the arm and provided with agage-surface for contact with the pattern and a gage-surface for contactwith work applied to the pattern, and a spring interposed between theslide and carrier.

7. In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame, a slide movable upon the arm and provided with agage-surface for contact with the pattern and a gage-surface for contactwith work applied to the pattern, and means arranged to vary therelation between the contact-surfaces.

8. In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame, a carrier variable in position upon the arm, anda slide movable in the carrier and provided with a gage-surface forcontact with the pattern and a gage-surface for contact with workapplied to the pattern.

9. In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame, a carrier variable in position upon the arm, aslide movable in the carrier and provided with a gage-surface forcontact with the pattern and a gage-surface for contact with workapplied to the pattern, and a spring interposed between the slide andthe carrier.

10. In a cutting machine, a pattern, a movable carrier, a work-gagemovable upon the carrier under the influence of the pattern, and a lookby which the gage is secured upon the carrier.

11. In a cutting machine, a pattern, a movable carrier, a work-gagemovable upon the carrier and movable thereby into and out of activerelation to the pattern, means for urging the gage upon the carrieryieldably toward the pattern, and means for temporarily retaining thegage against such forward movement.

12. In a cutting machine, a pattern, a movable carrier, a work-gagemovable upon the carrier and movable thereby into and out of contactwith the pattern and positioned upon the carrier by such contact, andmeans for temporarily retaining the gage in the position to which it isthus set, said retaining means becoming effective as the gage retreatsfrom the pattern.

13. In a cutting machine, a pattern, a movable carrier, at work-gagemovable upon the carrier and movable thereby into and out of activerelation to the pattern, means for urging the gage upon the carrieryieldably toward the pattern, means for retaining the gage against suchforward movement, and means for releasing the retaining means as thegage approaches its active position.

14. In a cutting machine, a pattern, a movable carrier, at work-gagemovable upon the carrier and movable thereby into and out of activerelation to the pattern, means for urging the gage upon the carrieryieldably toward the pattern, means for retaining the gage against suchforward movement, means for releasing the retaining means as the gageapproaches its active position, and means arranged to vary the time atwhich the releasing means acts upon the retaining means.

15. In a rounding machine, a frame, a pattern mounted thereon, an annpivoted upon the frame and having a carrier-portion, a gage-slidemovable upon the carrier under the influence of the pattern, and aclutch member interposed between the slide and the carrier.

16. In a rounding machine, a frame, a pattern mounted thereon, an, armpivoted upon the frame and having a carrier-portion, a gage-slidemovable upon the carrier under the influence of the pattern, a clutchmember interposed between the slide and the carrier, and a releasingmember fixed relatively to the carrier and acting upon the clutchmember.

17. In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame and having a carrier-portion, a gage-slidemovable upon the carrier under the influence of the pattern, a clutchmember interposed between the slide and the carrier, a releasing memberfixed relatively to the carrier and acting upon the clutch member, andmeans arranged to secure the releasing member in different positionswith respect to the periphery of the pattern.

18. In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame and having a carrier-portion, a gage-slidemovable upon the carrier under the influence of the pattern, the carrierand slide having opposed surfaces, one of which is inclined with respectto the other, and a clutch member having a curved periphery for contactwith said surfaces.

19. In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame and having a carrier-portion, a gage-slidemovable upon the carrier under the influence of the pattern, the carrierand slide having opposed surfaces, one of which is inclined with respectto the other, a disk arranged for contact at its periphery with saidsurfaces, a pin movable in the carrier for engagement with the disk, anda relatively fixed member acting upon the pin in the movement of thearm.

20. In a rounding machine, a frame, a pattern mounted thereon, an armpivoted upon the frame and having a carrier-portion, a gage-slidemovable upon the carrier under the influence of the pattern, the carrierand slide having opposed surfaces, one of which is inclined with respectto the other, a disk arranged for contact With said surfaces at itsperiphery, a pin movable in the carrier for engagement with the disk, aholder angularly adjustable upon the frame, a rod carried by the holderand arranged to act upon the pin in the movement of the arm, and meansarranged to secure the rod in. different positions upon the holder.

21. In a rounding machine, a pattern, gage mechanism movable toward andfrom the pattern, an abutment co-operating with the pattern, saidpattern and abutment being relatively movable to clamp the work, treadlemechanism by which the relative movement is pro duced, said treadlemechanism including a lever movable in contact with the treadle, andconnections by which the movement of the lever is transmitted to thegage mechanism.

22. In a rounding machine, a pattern, gage mechanism movable toward andfrom the pattern, a work-clamp movable toward and from the pattern,treadle mechanism by which the clamp is moved, and a cable connectingthe treadle mechanism to the gage mechanism to separate said gagemechanism from the pattern.

23. In a rounding machine, a pattern, a work-- clamp movable toward andfrom the pattern, a work-gage movable into and out of active relation tothe pattern, means for actuation by the operator to move the clamptoward the pattern and the gage from said pattern, and means arranged tolock the gage in. its inactive position against movement.

24. In a rounding machine, a frame, a pattern mounted thereon, a shaftrotatable upon the frame, a gage movable by the shaft into and out ofactive relation to the pattern, a spring acting upon the shaft to carrythe gage to its active position, and means arranged to lock the shaft tothe frame with the gage in its inactive position,

25. In a rounding machine, a frame, a pattern mounted thereon, a shaftrotatable upon the frame, a clamp movable upon the frame toward and fromthe pattern, a gage movable by the shaft into and out of active relationto the pattern, a spring acting upon the shaft to carry the gage to itsactive position, a treadle connected to the clamp to move it toward thepattern, an arm projecting from the shaft and joined to the treadle, andmeans arranged to lock the arm to the frame.

26. In a cutting machine, a pattern, an abutment co-operating with thepattern, said pattern and abutment being relatively movable to clamp thework, mechanism including a knife movable about the pattern, a membermovable to control the clamping action, a starting member for the knifemechanism, and means for preventing the actuation of the starting memberuntil after movement of the controlling member.

27. In a cutting machine, a pattern, an abutment cooperating with thepattern, said pattern and abutment being relatively movable to clamp thework, mechanism including a knife movable about the pattern, a membermovable to control the clamping action, gage mechanism movable into andout of co-operation with the pattern, separation of the gage mechanismfrom the pattern being dependent upon actuation of the controllingmember, a starting member for the knife mechanism, and means forpreventing the actuation of the starting member until after movement ofthe controlling member.

28. In a rounding machine, a pattern, workclamping mechanismco-operating with the pattern, a knife movable about the pattern, amember movable to start the travel of the knife, gage mechanism movableinto and out of cooperation with the pattern, and connections to theclamping mechanism for governing the starting member.

29. In a rounding machine, a pattern, a movable work-clamp co-operatingwith the pattern, treadle mechanism for moving the clamp, mechanismincluding a knife movable about the pattern, a starting lever for theknife mechanism, gage mechanism co-operating with the pattern andseparated therefrom upon movement of the clamp, and a member connectedto the starting lever and movable by the treadle mechanism into and outof position for locking the lever against movement.

30. In a rounding machine, a pattern, a workclamp movable toward andfrom the pattern, a knife movable about the pattern, a lever forstarting the travel of the knife, treadle mechanism including astop-portion, and a rod connected to the starting lever and movable bythe treadle mechanism into and out of position to engage thestop-portion.

31. In a rounding machine, a pattern, a workclamp movable toward andfrom the pattern, a knife movable about the pattern, a lever forstarting the travel of the knife, treadle mechanism including a leverand a stop-portion, gage mechanism movable into and out of co-operationwith the pattern, connections to the treadle mechanism to move the gagemechanism, and a rod connected to the starting lever and movable by thelever of the treadle mechanism into and out of position to engage thestop-portion.

FREDERIC E. BERTRAND.

